CWB 2 Visual Weld Inspector Certification Exam
CWB (Canadian Welding Bureau) Level 2
Practice Questions and Answers With Rationales
Graded A+
The CWB (Canadian Welding Bureau) Level 2 Visual Weld Inspector
Certification Exam is a comprehensive assessment designed for welding
professionals seeking advanced certification in visual weld inspection.
This exam evaluates candidates' knowledge across multiple domains
including welding processes (SMAW, GMAW, GTAW, FCAW, SAW), metallurgy,
welding metallurgy, inspection techniques, code requirements, welding
defects, and quality control procedures.
This practice question bank contains 125 questions aligned with the exam
content areas. Each question includes the correct answer and a brief
rationale to support your preparation for the CWB Level 2 certification exam.
SECTION 1: WELDING PROCESSES AND FUNDAMENTALS
1. SAW Fluxes that significantly influence the composition of the weld
metal through slag/metal reactions are called:
A) Neutral fluxes
B) Active fluxes
C) Basic fluxes
D) Acidic fluxes
Answer: B) Active fluxes
Active fluxes participate in slag/metal reactions, influencing weld metal
composition by adding or removing alloying elements.
2. A welding arc consists of a:
A) Low current and low voltage
B) High current and high voltage
C) High current and low voltage
, D) Low current and high voltage
Answer: C) High current and low voltage
The welding arc is characterized by high current (amperage) and low
voltage, creating intense heat for welding.
3. The heat of the welding arc is used to:
A) Only melt the base material
B) Only melt the filler material
C) Locally melt the base material and filler material to create fusion
upon solidification
D) Melt the flux only
Answer: C) Locally melt the base material and filler material to create
fusion upon solidification
The arc heat melts both base and filler materials, which then fuse
together upon cooling and solidification.
4. Welding using GTAW process with current set to DCEN:
A) 30% arc heat at the electrode and 70% arc heat at the work
B) 50% arc heat at the electrode and 50% arc heat at the work
C) 70% arc heat at the electrode and 30% arc heat at the work
D) 100% arc heat at the electrode
Answer: A) 30% arc heat at the electrode and 70% arc heat at the work
DCEN (Direct Current Electrode Negative) directs approximately 70% of
the heat to the workpiece for deeper penetration.
5. The function of the ingredients in the electrode coating of SMAW
electrodes is to:
A) Provide only a gas shield
B) Provide only a slag covering
C) Provide a gas shield, slag covering, scavengers, arc stabilization
and additional alloying elements
D) Provide only arc stabilization
Answer: C) Provide a gas shield, slag covering, scavengers, arc
stabilization and additional alloying elements
SMAW electrode coatings serve multiple functions including shielding,
, slag formation, deoxidizing, arc stabilization, and alloying.
6. The temperature for holding low hydrogen electrodes:
A) 80°C
B) 100°C
C) 120°C
D) 150°C
Answer: C) 120°C
Low hydrogen electrodes must be held at 120°C (approximately 250°F)
to maintain their low hydrogen properties.
7. The GMAW process uses (Blank) to shield the molten weld from the
atmosphere:
A) Flux
B) External shielding gas
C) Electrode coating
D) Slag
Answer: B) External shielding gas
GMAW uses an externally supplied shielding gas (such as argon, CO2, or
mixtures) to protect the molten weld pool.
8. The flux cored arc welding is an arc welding process usually in the
semi-automatic mode, consisting of:
A) A constant voltage power supply, a continuous speed wire feeder, a
welding gun, and a continuous filler metal electrode with a hollow
core containing flux and other ingredients
B) A constant current power supply, a continuous speed wire feeder, a
welding gun, and a continuous filler metal electrode with a hollow
core containing flux and other ingredients
C) A constant current power supply only
D) A constant voltage power supply only
Answer: B) A constant current power supply, a continuous speed wire
feeder, a welding gun, and a continuous filler metal electrode with a
hollow core containing flux and other ingredients
FCAW uses a constant current power supply with a tubular electrode
containing flux.
, 9. Welding is a joining process that by definition requires application of:
A) Heat only
B) Pressure only
C) Either heat or pressure
D) Both heat and pressure
Answer: C) Either heat or pressure
Welding can be achieved through heat, pressure, or a combination of both.
10. Name the two main methods of arc shielding:
A) Flux shielding and gas shielding
B) Flux shielding and slag shielding
C) Gas shielding and slag shielding
D) Gas shielding and powder shielding
Answer: A) Flux shielding and gas shielding
Arc shielding is accomplished either through flux (which produces gas
and slag) or externally supplied shielding gas.
11. Which direction do the electrons flow in an electrical arc?
A) Anode to cathode
B) Cathode to anode
C) Both directions
D) Random direction
Answer: B) Cathode to anode
In an electrical arc, electrons flow from the cathode (negative
terminal) to the anode (positive terminal).
12. In arc welding, the electric arc is intensely hot with temperature
exceeding:
A) 3,000°C
B) 10,000°C
C) 20,000°C
D) 30,000°C
Answer: D) 30,000°C
The electric arc in welding can reach temperatures exceeding 30,000°C,
making it one of the hottest man-made phenomena.
CWB (Canadian Welding Bureau) Level 2
Practice Questions and Answers With Rationales
Graded A+
The CWB (Canadian Welding Bureau) Level 2 Visual Weld Inspector
Certification Exam is a comprehensive assessment designed for welding
professionals seeking advanced certification in visual weld inspection.
This exam evaluates candidates' knowledge across multiple domains
including welding processes (SMAW, GMAW, GTAW, FCAW, SAW), metallurgy,
welding metallurgy, inspection techniques, code requirements, welding
defects, and quality control procedures.
This practice question bank contains 125 questions aligned with the exam
content areas. Each question includes the correct answer and a brief
rationale to support your preparation for the CWB Level 2 certification exam.
SECTION 1: WELDING PROCESSES AND FUNDAMENTALS
1. SAW Fluxes that significantly influence the composition of the weld
metal through slag/metal reactions are called:
A) Neutral fluxes
B) Active fluxes
C) Basic fluxes
D) Acidic fluxes
Answer: B) Active fluxes
Active fluxes participate in slag/metal reactions, influencing weld metal
composition by adding or removing alloying elements.
2. A welding arc consists of a:
A) Low current and low voltage
B) High current and high voltage
C) High current and low voltage
, D) Low current and high voltage
Answer: C) High current and low voltage
The welding arc is characterized by high current (amperage) and low
voltage, creating intense heat for welding.
3. The heat of the welding arc is used to:
A) Only melt the base material
B) Only melt the filler material
C) Locally melt the base material and filler material to create fusion
upon solidification
D) Melt the flux only
Answer: C) Locally melt the base material and filler material to create
fusion upon solidification
The arc heat melts both base and filler materials, which then fuse
together upon cooling and solidification.
4. Welding using GTAW process with current set to DCEN:
A) 30% arc heat at the electrode and 70% arc heat at the work
B) 50% arc heat at the electrode and 50% arc heat at the work
C) 70% arc heat at the electrode and 30% arc heat at the work
D) 100% arc heat at the electrode
Answer: A) 30% arc heat at the electrode and 70% arc heat at the work
DCEN (Direct Current Electrode Negative) directs approximately 70% of
the heat to the workpiece for deeper penetration.
5. The function of the ingredients in the electrode coating of SMAW
electrodes is to:
A) Provide only a gas shield
B) Provide only a slag covering
C) Provide a gas shield, slag covering, scavengers, arc stabilization
and additional alloying elements
D) Provide only arc stabilization
Answer: C) Provide a gas shield, slag covering, scavengers, arc
stabilization and additional alloying elements
SMAW electrode coatings serve multiple functions including shielding,
, slag formation, deoxidizing, arc stabilization, and alloying.
6. The temperature for holding low hydrogen electrodes:
A) 80°C
B) 100°C
C) 120°C
D) 150°C
Answer: C) 120°C
Low hydrogen electrodes must be held at 120°C (approximately 250°F)
to maintain their low hydrogen properties.
7. The GMAW process uses (Blank) to shield the molten weld from the
atmosphere:
A) Flux
B) External shielding gas
C) Electrode coating
D) Slag
Answer: B) External shielding gas
GMAW uses an externally supplied shielding gas (such as argon, CO2, or
mixtures) to protect the molten weld pool.
8. The flux cored arc welding is an arc welding process usually in the
semi-automatic mode, consisting of:
A) A constant voltage power supply, a continuous speed wire feeder, a
welding gun, and a continuous filler metal electrode with a hollow
core containing flux and other ingredients
B) A constant current power supply, a continuous speed wire feeder, a
welding gun, and a continuous filler metal electrode with a hollow
core containing flux and other ingredients
C) A constant current power supply only
D) A constant voltage power supply only
Answer: B) A constant current power supply, a continuous speed wire
feeder, a welding gun, and a continuous filler metal electrode with a
hollow core containing flux and other ingredients
FCAW uses a constant current power supply with a tubular electrode
containing flux.
, 9. Welding is a joining process that by definition requires application of:
A) Heat only
B) Pressure only
C) Either heat or pressure
D) Both heat and pressure
Answer: C) Either heat or pressure
Welding can be achieved through heat, pressure, or a combination of both.
10. Name the two main methods of arc shielding:
A) Flux shielding and gas shielding
B) Flux shielding and slag shielding
C) Gas shielding and slag shielding
D) Gas shielding and powder shielding
Answer: A) Flux shielding and gas shielding
Arc shielding is accomplished either through flux (which produces gas
and slag) or externally supplied shielding gas.
11. Which direction do the electrons flow in an electrical arc?
A) Anode to cathode
B) Cathode to anode
C) Both directions
D) Random direction
Answer: B) Cathode to anode
In an electrical arc, electrons flow from the cathode (negative
terminal) to the anode (positive terminal).
12. In arc welding, the electric arc is intensely hot with temperature
exceeding:
A) 3,000°C
B) 10,000°C
C) 20,000°C
D) 30,000°C
Answer: D) 30,000°C
The electric arc in welding can reach temperatures exceeding 30,000°C,
making it one of the hottest man-made phenomena.
